Materials Data on K3AsI6 by Materials Project
(K)2KAsI6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight potassium molecules and one KAsI6 framework. In the KAsI6 framework, K1+ is bonded to six equivalent I1- atoms to form KI6 octahedra that share corners with six equivalent AsI6 octahedra. The corner-sharing octahedral tilt angles are 0°. All K–I bond lengths are 3.35 Å. As3+ is bonded to six equivalent I1- atoms to form AsI6 octahedra that share corners with six equivalent KI6 octahedra. The corner-sharing octahedral tilt angles are 0°. All As–I bond lengths are 2.87 Å. I1- is bonded in a linear geometry to one K1+ and one As3+ atom.
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